Wagar, W. W. (1973). Books in world history: A guide for teachers and students. Indiana University Press.
Čikaški stil citiranja (17. izdanje)Wagar, W. Warren. Books in World History: A Guide for Teachers and Students. Bloomington: Indiana University Press, 1973.
MLA način citiranja (9. izdanje)Wagar, W. Warren. Books in World History: A Guide for Teachers and Students. Indiana University Press, 1973.
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